Скачать или смотреть How to Show and Hide a Div Tag in ASP.NET C# without JavaScript

Learn how to effectively manage the visibility of a div tag in ASP.NET C# by using simple conditional statements. This guide focuses on eliminating the need for JavaScript and provides an easy solution using Razor syntax.
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This video is based on the question https://stackoverflow.com/q/67966268/ asked by the user 'Lidprogsky' ( https://stackoverflow.com/u/15784709/ ) and on the answer https://stackoverflow.com/a/67966307/ provided by the user 'Nima Talebi' ( https://stackoverflow.com/u/7834019/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Show and Hide a Div Tag in ASP.NET C# without JavaScript

Managing the visibility of HTML elements is a common requirement in web development. This allows developers to present relevant information to users based on specific conditions. In this guide, we will explore how to conditionally show or hide a div tag in an Index.cshtml file of an ASP.NET C# application using Razor syntax, without relying on JavaScript.

The Problem Statement

Suppose you have a boolean property in your ViewModel.cs file, named HasPackType, that dictates whether a certain div should be displayed:

[[See Video to Reveal this Text or Code Snippet]]

Your goal is straightforward: if HasPackType is true, the div must be hidden. Conversely, if it is false, the div should show up. Many developers may be tempted to use JavaScript for such functionality, but for this specific example, we aim to achieve the desired behavior using simple Razor syntax.

Proposed Solutions

Solution 1: Using Inline CSS with Razor

One way to achieve the desired effect without JavaScript is by using inline CSS combined with a conditional statement in Razor syntax. Here’s how you can implement it:

[[See Video to Reveal this Text or Code Snippet]]

In this code:

We're using the conditional operator ? :. If Model.HasPackType is true, the CSS style display: none; is applied, effectively hiding the div. If it's false, no style is applied, and the div will show up as normal.

Solution 2: Using Razor Conditionals

Another approach is to completely avoid generating the div element if HasPackType evaluates to true. This can help in keeping your HTML clean and ensures that the div is not part of the DOM when it shouldn't be displayed. Here’s an example:

[[See Video to Reveal this Text or Code Snippet]]

In this case:

The div tag will only be rendered if Model.HasPackType is false, providing a simpler UI when HasPackType is true.

Conclusion

In summary, managing the visibility of elements in ASP.NET C# using Razor syntax is straightforward and eliminates the need for additional JavaScript code. Both solutions provided above will effectively hide the div based on the HasPackType property. You can choose the approach that best fits your coding style or application requirements, whether you prefer inline styling or controlling the rendering of HTML elements.

Feel free to further customize these methods to meet your specific needs. Happy coding!